Sex WRAS
High exchange Low exchange
Percent mature, based on observation of secondary sexual characteristics1(n=357) Male 75.6 ± 13.7 67.8 ± 8.07
Female 11.3 ± 3.27 3.23 ± 1.47
Gonadosomatic index (n=24) Male 6.79 ± 0.30 5.94 ± 0.79
Female 3.06 ± 1.38 5.24 ± 4.97
1Secondary sexual characteristics: males=prominent kype; females=ovipositor. Percentage mature based on final fish numbers with assumed 50:50 male:female ratio. Different letters between treatments for each sex indicate differences trending toward statistical significance (0.10 ≥ p ≥ 0.05).
Table 1: End-of-study fish maturation assessments, summarizing prevalence of qualitatively determined sexually mature individuals and quantitatively determined gonadosomatic indices for each sex within high and low exchange WRAS treatment groups.
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